1 files changed, 19 insertions, 0 deletions
diff --git a/test/PCH/pragma-diag.c b/test/PCH/pragma-diag.c
new file mode 100644
index 000000000000..c5171036400f
--- /dev/null
+++ b/test/PCH/pragma-diag.c
@@ -0,0 +1,19 @@
+// Test this without pch.
+// RUN: %clang_cc1 %s -include %s -verify -fsyntax-only
+
+// Test with pch.
+// RUN: %clang_cc1 %s -emit-pch -o %t
+// RUN: %clang_cc1 %s -include-pch %t -verify -fsyntax-only
+
+#ifndef HEADER
+#define HEADER
+
+#pragma clang diagnostic ignored "-Wtautological-compare"
+
+#else
+
+void f() {
+  int b = b==b;
+}
+
+#endif